Video: KS1-M17 • Paper 1 • Question 11

20 + _ = 70

01:20

Video Transcript

20 plus what equals 70.

What do we need to add to 20 to make 70? This bar represents our total, 70. The orange bar is worth 20. We need to work out what to add to 20 to make 70, 10, 20, 30, 40. 20 and 50 make 70. The missing number is 50.

An even quicker way to find the answer will be to think about number facts we already know. We know that two plus five equals seven. So two tens or 20 plus five tens or 50 equals seven tens, which is 70.

20 plus 50 equals 70.

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.